Fuel and air

P0005 — Fuel Shutoff Valve A Control Circuit/Open

Severity: medium Drive with care, to a shop

What P0005 means

The engine control unit operates fuel shutoff valve A, which opens or blocks fuel supply to the engine. When it sees an open circuit or a voltage that doesn't match its command on the control circuit, it sets P0005. The cause can be wiring, the valve itself, or the ECM's output driver.

Symptoms

  • Check Engine light on
  • Engine cranks but won't start
  • Engine stalls while driving
  • Rough running or misfires
  • Reduced power
  • Intermittent loss of power

Possible causes

  1. Open or damaged wiring in the valve control circuit
  2. Failed fuel shutoff valve A
  3. Corroded or loose connector
  4. Poor ground in the valve circuit
  5. Blown fuse or failed relay
  6. Faulty ECM output driver

How to diagnose

  1. Read the codes and freeze frame data, clear the code and see if it returns
  2. Inspect the valve connector and harness for chafing, damage and corrosion
  3. Check the fuse and relay for the valve circuit
  4. Test for power and ground at the valve connector
  5. Measure the valve coil resistance and compare it to specification
  6. Test the control wire between the valve and the ECM for opens and shorts
  7. Check the ECM command with a scan tool or scope
  8. If wiring and valve are good, test or replace the ECM

Common fixes

  • Repair the wire or replace the damaged connector
  • Replace the faulty fuel shutoff valve A
  • Replace the fuse or relay
  • Restore the ground connection
  • Replace or reprogram the ECM if its driver is faulty

Questions and answers

Can I drive with a P0005 code?

Only for short distances and with caution. The engine may stall or not restart, so repair it soon.

What most often causes P0005?

Most often it's an open wire or poor connector contact, or a bad valve. A failed ECM is less common and is checked last.

Can I just clear the P0005 code?

Clearing it only turns the light off for a while. If the circuit is still open the code will return and the engine may stall.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.